Android EventBus Subscriber class XXXActivity has no public methods called onEvent

Error message:

Caused by: c.a.a.g: Subscriber class XXXActivity has no public methods called onEvent.

There are two reasons for this error:

A: On the page that accepts Event, EventBus.getDefualt().register(this) is written, but in this page there is no definition of a method starting with onEvent, non-static, public permission, and only one parameter , that is There is no such method as: public void onEvent**(Object arg).

The solution is very simple, just check whether the page needs the onEvent**(Object arg) method. PS: Only on pages that need to receive EventBus messages, you should register EventBus.getDefault().register(this), and override a public method starting with onEvent, if you just simply send a message EventBus.getDefault(). post(bean); is not required to register.

B: If the inspection finds that the onEvent** (Object arg) method is indeed written, but an error is still reported, or the debug package is normal, but the Release package crashes, the reason is the confusion .

Solution: Just ignore the obfuscation of onEvent in your obfuscation file. The obfuscation methods of different versions may be a little different. Check the corresponding obfuscation method according to your eventBus version. ( EventBus github address )

Example: EventBus 2.4 obfuscation method:

-keep class de.greenrobot.event.** {*;}
-keepclassmembers class ** {
    public void onEvent*(**);
    void onEvent*(**);
}

The obfuscation method of EventBus 3.0:

-keepattributes *Annotation*
-keepclassmembers class * {
    @org.greenrobot.eventbus.Subscribe <methods>;
}
-keep enum org.greenrobot.eventbus.ThreadMode { *; }
 
# And if you use AsyncExecutor:
-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent {
    <init>(java.lang.Throwable);
}

So far the problem is solved. In the future, if the debug package is normal, but the release package crashes or is abnormal, most of them are the cause of confusion.

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